At present, in the distribution automation system, the test of the power distribution terminal requires external input to the power distribution terminal through a tester simulation protection test. After the status of the power distribution terminal changes, upload the signal to the client (master station). The client compares the received signal with the local signal of the power distribution terminal, and artificially determines whether the communication behavior of the power distribution terminal is correct. It can also simulate multiple power distribution terminal information uploads through several avalanche tests to simply understand the network load and the signal is correct. rate. However, this test method has the following disadvantages: it is not possible to comprehensively test the communication capability of the client (master station); the correctness of the ICD model provided by the manufacturer can be verified only through the point test of the tester; the distribution automation cannot be fully understood Peak network communication load of the system. The IEC 61850-based power distribution terminal simulator designed and developed in this article makes up for the above shortcomings. It can simulate the external communication behavior of all power distribution terminals at the whole station and conduct comprehensive tests on power distribution terminal equipment, so as to better use IEC 61850 communication standard. In this paper, a simulation experiment is performed to set a fault in the section where load node 2 is located, set the remaining capacity of switch S1 to 450A, set the remaining capacity of switch S2 to 350A, and set the remaining capacity of switch S3 to 470A, and the modeling time is 1.85s. Contact switch power supply conditions. The power distribution terminal simulator runs on a computer, eliminating the need for testers and other equipment, which can reduce the workload of the staff and greatly shorten the project commissioning time.
The safe and stable operation of the power grid system is conducive to ensuring the orderly development of China’s economy. Therefore, we must firmly grasp the development trend of the power distribution automation power system, comprehensively grasp and understand its existing problems, and formulate targeted solutions. This paper mainly studies the application of IEC61850 in intelligent distributed network automation. The communication application IEC 61850 of the master station and the terminal in the distribution network automation is the current development direction. The use of object-oriented modeling technology and a unified configuration language can improve interoperability between devices, reduce communication configuration, and reduce the workload of installation and commissioning. The communication service mapping defined by IEC 61850 is completely suitable for distribution network automation communication. Adopt distribution Intelligent control technology and design based on the IEC61850 standard are the development trends of intelligent power distribution terminals. This paper gives the structure of a distributed intelligent distribution automation system. The control mode studied in this paper has an impact on the system’s annual outage time indicators, and the indicator SAIDI is correspondingly increased, and the corresponding proportions are 52.1% and 43.2%. ENS and ASAI are proportional to the optimization level of this indicator, so it can be shown that the construction of distribution network automation can effectively reduce the power outage duration of the entire system, which has a significant effect on improving the reliability of distribution network power supply.
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